Knowledge

Q&A: What happens if you don’t fast before a blood test?2019-12-04 Q: What happens if you don’t fast before a blood test? Should you still do the test? A: If you don’t fast before a test that requires it, the results may not be accurate. If you forget and eat or drink something, call your provider and ask if the test can still be done. Some ...

What about fasting for a blood test during pregnancy?2019-12-04 There are several blood tests you may need if you’re pregnant. These are designed to assess any potential health concerns that you or your baby might experience during pregnancy or after you give birth. Some of these tests will require you to fast beforehand. Your doctor will advise you how to pr...

What if your child needs to fast before a blood test?2019-12-04 Just like adults, children may need blood tests that require them to fast beforehand. If so, your child’s pediatrician will let you know how long your child should abstain from eating and drinking. Tips • Schedule your child’s blood test as early in the day as possible. • Distract, distra...

Is it OK to drink water before a blood test?2019-12-04 It’s fine to drink water before a blood test, unless you’re instructed otherwise by your doctor. This is different from some surgical procedures, which may require you to have a totally empty stomach. Tap or bottled water are both OK, but leave the squeeze of lemon for another time. Seltzer...

Can you drink alcohol if you’re fasting before a blood test?2019-12-04 Some blood tests, such as those that assess liver health or triglyceride levels, may require you to not drink any alcohol for a full 24 hours. Trace amounts of alcohol can remain in your bloodstream for several days. If you have any concerns about alcohol consumption, discuss this with your docto...

Can you drink coffee if you’re fasting before a blood test?2019-12-04 Even if you drink it black, coffee can interfere with blood test results. That’s because it contains caffeine and soluble plant matter, which might skew your test results. Coffee is also a diuretic, which means that it will increase how much you pee. This can have a dehydrating effect. The less ...

How long should you fast before a blood test?2019-12-04 The amount of time you need to fast for will vary depending on the test. For most tests, you will be told not to consume anything but water for eight hours leading up to the test. For a few tests, a 12-hour fast may be needed. Tip • Schedule your test as early in the day as possible. The h...

How do you prepare for a blood test?2019-12-04 Some blood tests will require you to fast beforehand. In these cases, your doctor will instruct you not to eat or drink anything, except water, in the hours leading up to the test. Fasting before certain blood tests is important to help make sure that your test results are accurate. The vitamins...

The Takeaway2019-12-04Blood tests offer an important snapshot of your overall health. They’re also a good way to catch illness or disease early or see how well your body responds to treatments for various conditions. Get routine blood tests done at least once a year. Talk to your doctor to learn if there are any other...

What’s the typical blood work procedure?2019-12-04 These procedures are usually done at a laboratory or in a doctor’s office and take a few minutes. To perform a blood test, a nurse or technician: 1. Cleans the area on your arm where they’ll draw the blood from. 2. Ties a rubber band to your upper arm to help make your veins more visible. 3. ...

10 important blood tests2019-12-04 Let’s take a closer look at tests for adults to have done regularly. 1. Complete blood count A routine complete blood count CBC) test checks for levels of 10 different components of every major cell in your blood: white blood cells, red blood cells, and platelets. Important compone...

Who orders my blood tests?2019-12-04 Your doctor typically orders blood tests for you during a physical, checkup, or an appointment intended for a specific condition. Blood testing is usually partially or fully covered by insurance. Ordering tests through your medical provider ensures that you’re not paying too much. Your doct...

How long does it take to get results?2019-12-04 Results may take anywhere from a few hours to a few days to become available. Here’s an overview of how long some common tests may take: • complete blood count CBC): 24 hours • basic metabolic panel: 24 hours • complete metabolic panel: 24–72 hours • lipid panel: 24 hours. This can depe...

Why do some blood tests require fasting?2019-12-04 Everything you eat and drink contains vitamins, proteins, and other nutrients that can cause the related levels in your blood to temporarily spike or drop. Fasting for 8–12 hours helps ensure that blood test results are free from these variables, making your test results as accurate as possible....

What are some routine tests and others I should ask about?2019-12-04 Some of the most common routine tests are: • complete blood count CBC) • chemistry basic metabolic) panel • thyroid panel • nutrient tests for levels of vital nutrients, such as iron or B vitamins Some other tests that you may want include: • enzyme markers if you’re at risk for cancer...

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